Overview
The ZF 4166.339.276 Turbine Wheel is a critical rotating component within the torque converter assembly of the WG 65 Series transmission. This OEM genuine part is responsible for converting hydraulic energy from the pump into mechanical torque, which is then transmitted to the planetary gearset. As the driven member of the torque converter, the turbine wheel (SKU: 4166.339.276) directly influences shift quality and overall driveline efficiency. When installed correctly, it ensures smooth power delivery under heavy loads. This part is typically secured within the transmission housing, which must be inspected for wear during replacement; consider pairing it with a new TRANSMISSION HOUSING to maintain structural integrity.
Symptoms of Failure
- Delayed or harsh gear engagement: A worn turbine wheel reduces hydraulic coupling efficiency, causing noticeable lag when shifting from neutral to drive or reverse.
- Transmission overheating under load: As the turbine blades erode or crack, fluid slippage increases, generating excessive heat that may trigger warning lights.
- Loss of torque converter lockup: Damaged splines or blade deformation prevent proper stator interaction, leading to a constant “slipping” sensation at highway speeds.
- Metallic debris in transmission fluid: Fragments from a failing turbine wheel contaminate the oil, often accompanied by a whining noise from the torque converter area.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4166.339.276 |
| OEM Reference | ZF 4166.339.276 |
| Material | High-strength aluminum alloy with hardened steel hub |
| Outer Diameter | Approx. 340 mm |
| Weight | 4.8 kg (10.6 lbs) |
| Spline Count | 27 (input shaft) |
| Blade Angle | 38° (optimized for WG65 torque multiplication) |
Compatibility
This turbine wheel is specifically engineered for the ZF WG 65 Series, but it also fits select models in the WG180 and WG200 families that share the same torque converter architecture. It is directly compatible with WG65, WG180, and WG200 transmissions used in off-highway vehicles, wheel loaders, and industrial machinery. Always verify the transmission serial number before ordering. For secure mounting, use the appropriate HEXAGON SCREW, HEXAGON SCREW, and HEXAGON SCREW to fasten the turbine assembly to the driven hub.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101059 | TRANSMISSION HOUSING | Encloses and supports the turbine wheel assembly |
| 0636011038 | HEXAGON SCREW | Secures turbine hub to input shaft |
| 0636011118 | HEXAGON SCREW | Fastens turbine cover to housing |
| 0636016015 | HEXAGON SCREW | Mounts stator support bracket |
| 0631306085 | CYLINDRICAL PIN | Aligns turbine wheel during assembly |
| 0634313118 | O-RING | Seals turbine hub oil passages |
| 0636304019 | SCREW PLUG | Closes turbine drain port |
| 0634801152 | SEALING RING | Prevents fluid bypass at turbine shaft |
| 0732611049 | FILTER INSERT | Captures debris from turbine wear |
| 0634303718 | O-RING | Seals turbine-to-stator interface |
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